Buggy code:
private InvocationSite ( ) { public TypeBinding [ ] genericTypeArguments ( ) { } public boolean isSuperAccess ( ) { } public boolean isTypeAccess ( ) { } public void setActualReceiverType ( ReferenceBinding receiverType ) { } public void setDepth ( int depth ) { } public void setFieldIndex ( int depth ) { } public int sourceEnd ( ) { } public int sourceStart ( ) { } public TypeBinding expectedType ( ) { } } ; private int foundTypesCount ; private ObjectVector acceptedTypes ; private int foundConstructorsCount ; private ObjectVector acceptedConstructors ; public CompletionEngine ( SearchableEnvironment nameEnvironment , CompletionRequestor requestor , Map settings , IJavaProject javaProject , WorkingCopyOwner owner , IProgressMonitor monitor ) { } public void acceptConstructor ( int modifiers , char [ ] simpleTypeName , int parameterCount , char [ ] signature , char [ ] [ ] parameterTypes , char [ ] [ ] parameterNames , int typeModifiers , char [ ] packageName , int extraFlags , String path , AccessRestriction accessRestriction ) { } private void acceptConstructors ( Scope scope ) { } public void acceptPackage ( char [ ] packageName ) { } public void acceptType ( char [ ] packageName , char [ ] simpleTypeName , char [ ] [ ] enclosingTypeNames , int modifiers , AccessRestriction accessRestriction ) { } private void acceptTypes ( Scope scope ) { } public void acceptUnresolvedName ( char [ ] name ) { } private void addExpectedType ( TypeBinding type , Scope scope ) { } private void addForbiddenBindings ( Binding binding ) { } private void addUninterestingBindings ( Binding binding ) { } private final boolean areParametersCompatibleWith ( TypeBinding [ ] parameters , TypeBinding [ ] arguments , boolean isVarargs ) { } private void buildContext ( ASTNode astNode , ASTNode astNodeParent , CompilationUnitDeclaration compilationUnitDeclaration , Binding qualifiedBinding , Scope scope ) { } private void buildTokenLocationContext ( InternalCompletionContext context , Scope scope , ASTNode astNode , ASTNode astNodeParent ) { } void checkCancel ( ) { } private boolean complete ( ASTNode astNode , ASTNode astNodeParent , ASTNode enclosingNode , CompilationUnitDeclaration compilationUnitDeclaration , Binding qualifiedBinding , Scope scope , boolean insideTypeAnnotation ) { } public void complete ( ICompilationUnit sourceUnit , int completionPosition , int pos , ITypeRoot root ) { } public void complete ( IType type , char [ ] snippet , int position , char [ ] [ ] localVariableTypeNames , char [ ] [ ] localVariableNames , int [ ] localVariableModifiers , boolean isStatic ) { } private void completionOnBranchStatementLabel ( ASTNode astNode ) { } private void completionOnClassLiteralAccess ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnExplicitConstructorCall ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnFieldName ( ASTNode astNode , Scope scope ) { } private void completionOnFieldType ( ASTNode astNode , Scope scope ) { } private void completionOnJavadocAllocationExpression ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnJavadocFieldReference ( ASTNode astNode , Scope scope ) { } private void completionOnJavadocMessageSend ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnJavadocParamNameReference ( ASTNode astNode ) { } private void completionOnJavadocQualifiedTypeReference ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnJavadocSingleTypeReference ( ASTNode astNode , Scope scope ) { } private void completionOnJavadocTag ( ASTNode astNode ) { } private void completionOnJavadocTypeParamReference ( ASTNode astNode ) { } private void completionOnKeyword ( ASTNode astNode ) { } private void completionOnLocalOrArgumentName ( ASTNode astNode , Scope scope ) { } private void completionOnMarkerAnnotationName ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnMemberAccess ( ASTNode astNode , ASTNode enclosingNode , Binding qualifiedBinding , Scope scope , boolean insideTypeAnnotation ) { } private void completionOnMemberValueName ( ASTNode astNode , ASTNode astNodeParent , Scope scope , boolean insideTypeAnnotation ) { } private void completionOnMessageSend ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnMessageSendName ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnMethodName ( ASTNode astNode , Scope scope ) { } private void completionOnMethodReturnType ( ASTNode astNode , Scope scope ) { } private void completionOnParameterizedQualifiedTypeReference ( ASTNode astNode , ASTNode astNodeParent , Binding qualifiedBinding , Scope scope ) { } private boolean assistNodeIsExtendedType ( ASTNode astNode , ASTNode astNodeParent ) { } private boolean assistNodeIsInterfaceExcludingAnnotation ( ASTNode astNode , ASTNode astNodeParent ) { } private boolean assistNodeIsInsideCase ( ASTNode astNode , ASTNode astNodeParent ) { } private void completionOnQualifiedAllocationExpression ( ASTNode astNode , Binding qualifiedBinding , Scope scope ) { } private void completionOnQualifiedNameReference ( ASTNode astNode , ASTNode enclosingNode , Binding qualifiedBinding , Scope scope , boolean insideTypeAnnotation ) { } private void completionOnQualifiedTypeReference ( ASTNode astNode , ASTNode astNodeParent , Binding qualifiedBinding , Scope scope ) { } private void completionOnSingleNameReference ( ASTNode astNode , ASTNode astNodeParent , Scope scope , boolean insideTypeAnnotation ) { } private void completionOnSingleTypeReference ( ASTNode astNode , ASTNode astNodeParent , Binding qualifiedBinding , Scope scope ) { } private char [ ] [ ] computeAlreadyDefinedName ( BlockScope scope , InvocationSite invocationSite ) { } private void computeAlreadyDefinedName ( FieldBinding [ ] fields , Scope scope , boolean onlyStaticFields , ReferenceBinding receiverType , InvocationSite invocationSite , ArrayList result ) { } private void computeAlreadyDefinedName ( SourceTypeBinding receiverType , ClassScope scope , boolean onlyStaticFields , InvocationSite invocationSite , ArrayList result ) { } int computeBaseRelevance ( ) { } private void computeExpectedTypes ( ASTNode parent , ASTNode node , Scope scope ) { this . expectedTypesFilter = CompletionEngine . SUBTYPE ; this . hasJavaLangObjectAsExpectedType = false ; if ( ( parent instanceof AbstractVariableDeclaration ) && ( ! ( parent instanceof TypeParameter ) ) ) { AbstractVariableDeclaration variable = ( ( AbstractVariableDeclaration ) ( parent ) ) ; TypeBinding binding = variable . type . resolvedType ; if ( binding != null ) { if ( ! ( ( variable . initialization ) instanceof ArrayInitializer ) ) { addExpectedType ( binding , scope ) ; } else { binding = binding . leafComponentType ( ) ; addExpectedType ( binding , scope ) ; } } } else if ( parent instanceof Assignment ) { TypeBinding binding = ( ( Assignment ) ( parent ) ) . lhs . resolvedType ; if ( binding != null ) { addExpectedType ( binding , scope ) ; } } else if ( parent instanceof ReturnStatement ) { if ( ( scope . methodScope ( ) . referenceContext ) instanceof AbstractMethodDeclaration ) { MethodBinding methodBinding = ( ( AbstractMethodDeclaration ) ( scope . methodScope ( ) . referenceContext ) ) . binding ; TypeBinding binding = ( methodBinding == null ) ? null : methodBinding . returnType ; if ( binding != null ) { addExpectedType ( binding , scope ) ; } } } else if ( parent instanceof CastExpression ) { <START_BUG> Expression e = ( ( CastExpression ) ( parent ) ) . type ; <END_BUG>

Fix:
TypeReference e = ( ( CastExpression ) ( parent ) ) . type ;